Add close to input stream and cleanup socket and streams

tools/testing/dart/status_file_parser.dart

Index: tools/testing/dart/status_file_parser.dart
diff --git a/tools/testing/dart/status_file_parser.dart b/tools/testing/dart/status_file_parser.dart
index c29f9f584a4ff8f45f4330a9b52479ada8d1cbd6..ac53f89da57ab991c02b060d967bb67b355e7736 100644
--- a/tools/testing/dart/status_file_parser.dart
+++ b/tools/testing/dart/status_file_parser.dart
@@ -66,7 +66,7 @@ void ReadTestExpectationsInto(TestExpectations expectations,
 void ReadConfigurationInto(path, sections, onDone) {
   File file = new File(getFilename(path));
   if (!file.existsSync()) return;  // TODO(whesse): Handle missing file.
-  FileInputStream file_stream = file.openInputStream();
+  InputStream file_stream = file.openInputStream();
   StringInputStream lines = new StringInputStream(file_stream);
 
   Section current = new Section.always();
@@ -114,7 +114,6 @@ void ReadConfigurationInto(path, sections, onDone) {
   };
 
   lines.closeHandler = () {
-    file_stream.close();
     onDone();
   };
 }